Actors go full-frontal on screen fairly frequently—have you seen Gone Girl?—but sometimes, their body parts are...um...not their own. The needs for prosthetic penises can vary: Sometimes, actors understandably don't want millions of viewers to see what they look like fully naked. Sometimes, their characters are supposed to be packing a lot of heat. And sometimes, as in Daniel Radcliffe’s case, they have need for an on-screen erection that doubles as a compass. On that note, here are 11 famous dudes whose bits and pieces were the handiwork of Hollywood prop departments.